For nearly 40 years, Duncan has forged a career out of exposing unlawful and immoral government surveillance operations. Back in 1976, he co-authored a report for Time Out magazine called The Eavesdroppers, which revealed the existence of GCHQ (Government Communications Headquarters), the UK's largest and most secretive intelligence agency.

Exposing GCHQ would lead directly to his arrest in the ABC Case the following year, where he was prosecuted under the Official Secrets Act. As a result of the exposure brought by the case, he began working for the New Statesman. Over the next 15 years he produced investigative scoops revealing British government's warrantless phone-tapping and Echelon - a top secret global surveillance programme.

He has spoken extensively at conferences around the world, and given evidence at the European Parliament and Council of Europe on surveillance and privacy issues.

Most recently he has produced front page reports based on the Snowden files for Britain's Independent newspaper.

Below you will find links to his journalism, reports, interviews and related commentary and videos.

In June 2013, the Guardian and Washington Post began a series of reports based on confidential intelligence documents supplied by ex-NSA whistleblower, Edward Snowden. This sparked a renewed interest in surveillance reporting and its history. Read more

Secret espionage activity against Germany by the US triggered diplomatic crises when it was revealed that the US and Britain installed covert listening posts on the rooftops of their embassies. Read more